Newman, R.M. and L.M. Maher, 1995. New Records and Distribution of Aquatic Insect Herbivores of Watermilfoils (Haloragaceae: Myriophyllum spp.) in Minnesota, University of Minnesota.

Reprinted with Permission from Entomological News (1995) 106(1): 6-12

New Records and Distribution of Aquatic Insect Herbivores of Watermilfoils (Haloragaceae: Myriophyllum spp.) in Minnesota

Abstract
A survey of 19 lakes in Minnesota and six lakes in Wisconsin, for the presence of watermilfoil herbivores, indicated the presence of three taxa: a weevil Euhrychiopsis lecontei (Dietz) (Curculionidae), a lepidopteran, Acentria ephenerella (Denis & Schiffermüller) (Pyralidae) and a midge Cricotopus myriophylli Oliver (Chironomidae). We located the weevil, Euhrychiopsis lecontei, at 13 sites in 10 lakes; 11 of these sites were in Minnesota. The midge, Cricotopus myriophylli, was found at eight sites in six lakes, including two sites in Wisconsin, and the moth, Acentria ephemerella, was found at five sites, including one site in Wisconsin. The weevil and caterpillar had been recorded previously in Wisconsin, but not in Minnesota. The midge has not been reported previously outside of eastern Ontario and British Columbia.

Entire Paper
Contact: Raymond M. Newman, University of Minnesota, Department of Fisheries and Wildlife, 1980 Folwell Avenue, St. Paul, MN 55108-6124 
Key Words: Eurasian_watermilfoil, Population_dynamics, Colonization 
Product Type: Research, Predicting_the_spread
User Type: General